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| Great drain cleaned, looking north. Deep hole at right (east) side continues to north ... AMS Horizontal (normal) ... Great drain cleaned, looking north. Deep hole at right (east) side continues to north. |
| Middle drain to north of Building C, as cleared ... AMS north 2567 ... 31 May 1938 |
| West Branch of the Great Drain; the new course to the right, the old course to the left beneath Building C ... north Horizontal (normal) ... 1937 |
| Middle drain to north of Building C, as cleared ... north 2567 Horizontal (normal) ... 31 May 1938 |
| West Branch of the Great Drain; the new course to the right, the old course to the left beneath Building C ... AMS north Horizontal (normal) ... 1937 |
| Road looking east. Water channel block to north of Great Drain in foreground ... AMS Horizontal (normal) ... Water channel block to north of Great Drain in foreground. |
| Great Drain cut. Looking east, showing debris to north of big wall ... AMS Horizontal (normal) ... Great Drain cut. Looking east, showing debris to north of big wall. |
| Middle drain to the north of Building C, as cleared to bottom ... south Horizontal (normal) ... 24 May 1938 |
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